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What Is Data Modeling?
Designing how data is structured and related.
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AiTechWorlds
AiTechWorlds
Data modeling is designing how data is structured and related before building a database. This visual guide covers entities, attributes, relationships, ER diagrams, normalization, and how modeling differs for SQL and NoSQL.
Designing how data is structured and related.
Good models prevent costly redesigns later.
The things you store, like users or orders.
The properties of an entity.
How entities connect to each other.
Each record links to exactly one other.
One record links to many others.
Records link both ways via a join table.
Visualize entities and relationships.
Uniquely identify each record.
Link records across tables.
High-level view of the data.
Detailed structure, independent of tech.
How it’s implemented in a database.
Reduce duplication and anomalies.
Trade duplication for read speed.
Model around access patterns and queries.
Vague entities and missing relationships.
ER and diagramming tools help design.
Sketch entities and relationships before coding.
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